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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Developer - **Company:** Titan OS - **Location:** Barcelona, Spain - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Software Quality, Code Review, Databases, Continuous Integration, Relational Databases, DevOps, Github, PostgreSQL, Nginx, Node.Js, Software Architecture, Redis, Next.js, TypeScript, Management of Software Versions, Web Applications, Tailwind, ReactJS, Delivery Pipeline, Backend, Material UI, Npm(Software), React Redux, React Testing Library, JestJS, Docker - **Published:** May 17, 2026 - **Apply:** https://es.indeed.com/viewjob?jk=238b38aad131d09c ## About the Role Do you have experience in UI?, Are you ready to unleash your potential? We're on the lookout for driven individuals who thrive on setting ambitious goals, taking ownership, and working with a relentless sense of urgency to achieve remarkable results., Passion is the secret ingredient to our success! We're searching for people who are not just passionate, but genuinely obsessed with their work. If you're the type to devour the latest articles, spend your free time researching and taking courses, and constantly seek ways to grow and learn, then you'll fit right in. Our passionate individuals learn fast, work hard, and inspire those around them with their positive energy., * 5+ years of experience building full-stack web applications with Node.js and TypeScript. * Deep expertise in React.js and extensive hands-on experience with Next.js in a production environment. * Proven experience building and consuming APIs. * Solid experience with relational databases (like PostgreSQL) and ORMs (specifically Prisma). * Hands-on experience managing CI/CD pipelines (GitHub Actions preferred) and working with Docker. * Strong understanding of computer science fundamentals, software architecture, and best practices. * A passion for writing clean, high-quality, and maintainable code. * Strong experience with modern testing frameworks like Vitest and React Testing Library (RTL). Nice to have: * Experience developing or maintaining SDKs, npm libraries. * Experience with state management libraries like Zustand. * Familiarity with component libraries such as Radix UI. * Previous experience in a tech lead or mentorship capacity. ## Description Join our team as a Senior Full Stack Engineer and help build the platforms and tools that enable partners to seamlessly onboard their apps and channels to Titan OS. You'll develop full-stack solutions powering our Partner Solutions ecosystem, including web tools, APIs, and services that simplify and automate content and app onboarding. This is a high-impact role for an engineer passionate about developer tooling, platform enablement, and technical ownership, with the opportunity to shape systems that support our global partner network., * Full-Stack Development: Design, build, and maintain scalable, secure, and high-quality web applications using Next.js, TypeScript, and Node.js. * API Integration & Development: Lead the integration of our platform with a wide range of third-party and internal APIs to expand functionality. You will also contribute to the development and maintenance of our existing backend services. * Architectural Ownership: Evolve our existing full-stack architecture, making key technical decisions to ensure our platforms are scalable and maintainable for the future. * Problem Solving & Ambiguity: Tackle complex challenges, working collaboratively with product and design to clarify uncertain requirements and deliver effective technical solutions. * CI/CD and DevOps: Own and enhance the complete CI/CD process using GitHub Actions. This includes managing automated pipelines for testing, versioning, building, and publishing Docker images, and handling deployments. * Backend & Database Management: Develop robust backend services and manage the database lifecycle, including schema design and migrations using Prisma. * Championing Best Practices: Establish and enforce a strong testing culture using frameworks like Vitest and React Testing Library to ensure application reliability and quality. * Technical Leadership & Mentorship: Provide technical guidance to other developers, lead architectural discussions, and maintain high standards for code quality through code reviews. Our Tech Stack: * Framework: Next.js, React.js, Node.js * Language: TypeScript * Styling: Tailwind CSS, Radix UI * Database: PostgreSQL with Prisma (ORM) * CI/CD: GitHub Actions, Docker * Infrastructure: Nginx, Redis * Testing: Vitest, React Testing Library ## Related Videos - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Post-Quantum Cryptography: Preparing for Q-Day](https://www.wearedevelopers.com/videos/100179-post-quantum-cryptography-preparing-for-q-day) - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) - [Streaming AI Responses in Real-Time with SSE in Next.js & NestJS](https://www.wearedevelopers.com/videos/1630-streaming-ai-responses-in-real-time-with-sse-in-next-js-nestjs) ## Related Articles - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Dev Digest 131 - AI'm not sure about OSS](https://www.wearedevelopers.com/magazine/472-dev-digest-131-ai-m-not-sure-about-oss)